Your commercial roof is one of the most valuable assets of your building, yet it’s often overlooked until a problem arises – resulting in costly repairs or even premature roof replacement. Fortunately, many common commercial roof problems can be avoided with routine maintenance. By staying proactive, businesses can extend the lifespan of their roof, avoid unexpected expenses, and ensure their building remains safe and structurally sound.
Ponding Water
Ponding water occurs when water remains on a commercial roof for more than 48 hours after rainfall, increasing the risk of leaks, structural roof damage, and premature deterioration. Here are some common causes of ponding water:
- Poor drainage system: clogged or improperly installed drains, scuppers, or gutters prevent water from flowing off the roof
- Inadequate roof slope: some commercial roofs, particularly flat roofs, lack proper slope or tapering, causing water to pool in low areas
- Structural issues or roof settling: over time, buildings can shift, causing depressions in the roof where water collects
- Compressed or deteriorated insulation: heavy foot traffic or improper installation can compress the insulation beneath the roofing membrane, creating low spots
- Defective or aging roofing materials: worn-out membranes, seams, or coatings can allow water infiltration and create weak points where ponding water accelerates deterioration
Roof Leaks and Water Damage
These issues often stem from a combination of aging materials, poor drainage, and structural vulnerabilities. Over time, roofing membranes, flashing, and sealants can deteriorate due to exposure to harsh weather, UV rays, and general wear and tear. If these materials are not regularly inspected and maintained, small cracks or weaknesses can develop, allowing water to seep into the building. Additionally, punctures from foot traffic, falling debris, or severe storms can further compromise the roof’s integrity.
Faulty flashing and seals around vents, chimneys, skylights, and HVAC units can also create entry points for moisture if they are not correctly installed or maintained. Plus, poor ventilation can cause condensation to build up inside the roof system, leading to mold growth and structural issues over time.
Preventative inspections and regular maintenance are key to avoiding costly roof leaks, ponding, and water damage. Businesses should schedule routine roof inspections to identify and repair minor issues before they escalate.
Membrane Damage
Over time, harsh UV rays, temperature fluctuations, and severe weather conditions (like hail and heavy winds) can weaken the roofing membrane, leading to cracks, blisters, or shrinkage. These vulnerabilities allow water to seep in, causing leaks and structural deterioration.
Poor installation or subpar materials can result in weak seams and improper adhesion, making the roof more susceptible to premature damage. Additionally, foot traffic is another major cause of membrane damage, especially on roofs with frequent maintenance access for HVAC systems, vents, or satellite equipment. Without designated walkways or protective pads, repeated foot traffic can wear down the membrane, causing punctures or tears.
Learn about our roof safety railings, ladders, and walk paths.
Flashing Failures
Flashing – the metal or rubber material used to seal joints and edges around roof penetrations, such as vents, chimneys, skylights, and HVAC units – plays a critical role in preventing water intrusion. However, over time, flashing can deteriorate, compromising the roof’s ability to keep moisture out.
One of the primary causes of flashing failure is weather exposure. Constant expansion and contraction due to temperature changes can cause flashing to loosen, crack, or pull away from the roof surface. Heavy storms, strong winds, and ice buildup can further weaken flashing, creating gaps where water can seep in.
Poor installation is another common issue — if flashing is not properly secured or sealed, it can detach or fail prematurely. Learn about our roof curb and flashing services.
Roofing Material Deterioration
Over time, improper maintenance, poor material selection, and exposure to the elements (including heavy rain, hail, and snow) can accelerate the breakdown of roofing materials, compromising the integrity of the entire roof system.
One of the most common causes of deterioration is prolonged exposure to UV radiation. Constant sunlight can cause roofing membranes, asphalt, and coatings to dry out, crack, and lose their protective properties. A commercial roof coating can help reflect UV rays and lower the temperature of the roof.
GSM Roofing applied a high-quality commercial roof coating at Roxana Cannon Arsht Surgicenter in Wilmington, DE. This project aimed to extend the roof’s lifespan and provide long-term protection against the elements, ensuring a reliable and well-maintained roofing system for years to come.
Clogged Gutters and Drains
Clogged gutters and drains on commercial roofs are often caused by accumulated debris, such as leaves, twigs, dirt, and even nesting materials from birds or rodents. Poor drainage design or severe weather conditions can also contribute to blockages.
When gutters and drains become clogged, water cannot properly flow off the roof, leading to standing water and potential structural damage.
By staying proactive with routine inspections and timely repairs, businesses can extend the lifespan of their roof, reduce emergency repairs, and maintain a safe and efficient building. Investing in preventative commercial roof maintenance not only protects your property but also provides peace of mind, ensuring that your roof remains in top condition for years to come.